Just to be clear, the “three levels” Lewis is about to reference correspond to the readings from the previous three days: Scripture, teaching of Jesus and writings of Paul.
Thus on three levels, in appropriate degrees, we meet the same refusal of what we might have thought best for us—in the Word Himself, in the Apostle of the Gentiles, in Scripture as a whole. Since this is what God has done, this, we must conclude, was best. It may be that what we should have liked would have been fatal to us if granted. It may be indispensable that Our Lord’s teaching, by that elusiveness (to our systematising intellect), should demand a response from the whole man, should make it so clear that there is no question of learning a subject but of steeping ourselves in a Personality, acquiring a new outlook and temper, breathing a new atmosphere, suffering Him, in His own way, to rebuild in us the defaced image of Himself. So in St. Paul. Perhaps the sort of works I should wish him to have written would have been useless. The crabbedness, the appearance of inconsequence and even of sophistry, the turbulent mixture of petty detail, personal complaint, practical advice, and lyrical rapture, finally let through what matters more than ideas—a whole Christian life in operation—better say, Christ Himself operating in a man’s life. And in the same way, the value of the Old Testament may be dependent on what seems its imperfection. It may repel one use in order that we may be forced to use it in another way—to find the Word in it, not without repeated and leisurely reading nor without discriminations made by our conscience and our critical faculties, to re-live, while we read, the whole Jewish experience of God’s gradual and graded self-revelation, to feel the very contentions between the Word and the human material through which it works. For here again, it is our total response that has to be elicited.
C.S. Lewis, “Scripture,” Reflections on the Psalms (1958, this excerpt taken from The Essential C.S. Lewis Touchstone, 1998) 404.